it will be a powerful moment for mitt romney. >> they are preparing for mitt romney to come armed. >> they have been practicing the zingers for months. i'm sure they will have a bunch of lines. that's not what the american people are looking for. >> matt doud says at this point they are emphasizing style over substance. >> debates that have changed people's minds have been about physical characteristics and man riches, and not about the substance of the policy answers. >> they need challenges. it will avoid sounding like the professor he was before the white house. and romney must come across relatable and really connect with voters. abc news, washington. >>> arnold schwarzenegger's biography "total recall" goes on sale tomorrow. he talks about how he ruined his marriage with maria shriver. during an interview with "60 minutes" he praises shriver throughout the book" total recall" and regrets the infidelity that prompted shriver to file for divorce. >> i think it was the stupidest thing i have done in the whole relationship. it was terrible. i inflicted tremendous pain on maria and un